RADAR_CONTROL_SURVE

6 codes

** RADAR CONTROL/SURVEILLANCE
A UNDER RADAR CONTACT
B NOT UNDER RADAR CONTACT
C RADAR SERVICE NOT AVAILABLE
D DURING RADAR HAND-OFF
Z UNKNOWN/NOT REPORTED

Source

Codes verbatim from the ct_Pre1982 table of PRE1982.MDB — the FAA-distributed pre-1982 NTSB aviation accident database. Used internally by the Atlas to decode legacy accident records on every pre-1982 NTSB event page.